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Complete Guide: Configure and Customise ioQuake3 in Linux

"What is ioQuake3?
id Software released the Quake 3 source code to the public and
licensed it under the GNU GPL, which allows anyone to modify the
source code, create derivative games and do whatever they please
with it, as long as the license is still attached and the source
code for the distributed new product is made available.

"ioQuake3 is the active project who maintains the Quake 3 source
code, fixing bugs and making improvements to the engine. It's
practically the starting point for all the other game projects like
OpenArena.

"I must say, together with Wolfenstein: Enemy Territory,
OpenArena, Nexuiz, Unreal Tournament 2004 and Tremulous, ioQuake3
is still one of the most popular shooters out there for Linux. Of
course, there are Quake 4 or ET: Quake Wars too, and while the
first gets less attention now probably than even Quake 3, the
latter is very active and servers are usually full of players. But
they both seem to miss something from the awesomeness of the older,
classic games. It may be because Quake 3 (together with UT) were
probably once the defining shooter games, with few rivals at that
time."